Circuits FAQ - Design Notes: 07/01/2009

Tuesday, July 28, 2009

Sci.Electronics.Repair FAQ

Sci.Electronics.Repair FAQ

Sci.Electronics.Repair Frequently Asked Question(s) (or S.E.R FAQ for short) Home Page. This site features Samuel M. Goldwasser's latest and greatest "Notes on the Troubleshooting and Repair of..." series of comprehensive repair guides for consumer electronics equipment and other household devices. There is also a great deal of other information of interest to the electronics hobbyist, experimenter, technician, engineer, and possibly even the dentist and poet. Included are the now quite comprehensive and massive "Sam's Laser FAQ".

Sam's Laser FAQ has a great deal of information on a variety of laser and optics related topics including a comprehensive treatment of diode, helium-neon, argon/krypton ion, and CO2 lasers as well as amateur laser construction including numerous examples of truly home-built lasers. Much of this is not available anywhere else either on-line or in print!

Monday, July 27, 2009

Eng-Tips Forums - Electrical and Electronic

These pages will probably help you do a design review of your new circuit or even answer a doubt in your product design. Use the Search.

Electric power engineering
Electric motors & motor controls engineering
Electrical/Electronic engineering other topics
Circuit Design
Programmable Logic Controllers (PLC)
Communication & Signal Processing engineering
Antenna & Propagation engineering

Eng-Tips Forums

Sunday, July 26, 2009

ICL7129 AD Converter needs Triplexed LCD

I'm using the ICL7129ACPL to construct a simple 4-1/2 digit DVM. I looked over the application notes on FE LCDs on a similar post and noticed that it listed the FE0206 4-1/2 digit LCD as compatible with the ICL7129 so I went ahead and ordered one. I did not notice that the FE0206 has a single backplane listed (BP on pins 1 and 40) whereas the ICL7129 has three seperate backplanes (BP1, BP2, and BP3).

My question is:

can the three seperate BP pins on the ICL7129 be combined somehow to accomodate the single BP pin on the FE0206 or do I need to order a different LCD? If yes, how? Thanks in advance for any help you can offer.

Mail from CC USA

You have to buy this..

Digi-Key - 153-1055-ND Varitronix - VIM-503-DP-FC-S-HV. Its part no is - VIM-503-DP-FC-S-HV from Varitronix.

Another could be Mouser Varitronix LCD Displays. Ensure you buy correct part number, It is a Triplexed (like Multiplexed) Display.

The LCD you have will not do, that you can use for some Microcomputer projects. Look at this page Arduino you can do more projects with these.

delabs

Related Resources -

ICL7129A, MAX7129 - Maxim
Low-Noise, 4 1/2 Digit, Single-Chip ADC with Multiplexed LCD Drivers

Some Features -

±19,999 Count Resolution
10pA Max Input Bias Current (MAX7129)
3µV Peak-to-Peak Noise (ICL7129A)
Overrange/Underrange Outputs
Precise 10:1 Range Select